/** @file strncpy.c
 *
 * Modified from 15-410's 410usr library.
 *
 * @author Kartik Subramanian <ksubrama@andrew.cmu.edu>
 * @date 2008-10-30
 */
/* 
 * Mach Operating System
 * Copyright (c) 1992,1991,1990,1989 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 * File:    libmach_sa/strncpy.c
 * Author:  Mary R. Thompson at Carnegie Mellon
 * Date:    Oct 13, 1992
 * Abstract:
 *  strncpy copies "count" characters from the "from" string to
 *  the "to" string. If "from" contains less than "count" characters
 *  "to" will be padded with null characters until exactly "count"
 *  characters have been written. The return value is a pointer
 *  to the "to" string.
 */

#include <string.h>

char* strncpy(char *to, const char *from, size_t count)
{
	char *ret = to;

	while (count-- > 0 && (*to++ = *from++));

	while (count-- > 0) 
		*to++ = '\0';

	return ret;
}
